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You need to get the 4600 series. 5100's will bottom out and blow out.
Got it. How does everyone like the 4600's? I'm trying to not make the ride any stiffer. Truck currently has 10 year old Monroe's on it.
I just removed 4600's off my truck, but haven't compared them to the 5100s yet (as I don't have my truck back on the road yet). But, the 4600's are stiff - in my suburban, it was like riding in a tank.
Just googled around a little, I mistakenly thought that the 4600 series was specifically the HDs. Turns out the 4600 series can apply to Bilstein HDs or their Comfort series depending on part number. Same shocks, different valving. I run the HDs, which are the stiffer variety and came stock on Z71s. Even those feel pretty soft to me. I'd imagine the Comfort series are quite a bit softer. Check out eshocks.com for the best prices, they've got all the applicable part numbers listed as well.
Z71SE, like I said, the Bilstein 4600 HDs actually ARE your OEM shocks. GM put them on the Z71s from the factory. If you want to retain your factory ride, go with HDs. If you want it even softer than factory, go with the Comfort series.
99Subourbon, I really don't understand how you thought they were too stiff. I mean different strokes I guess, but the HDs I run are damn near brand new and they're super comfy. Did you have your front end cranked while you ran them? That single handedly kills ride quality worse than anything on a 4WD GMT400 in my experience.